Crescend Technologies UHFP10XXUL1 Users Manual

INSTALLATION AND SERVICE

MANUAL

CONTINUOUS DUTY

UHF POWER AMPLIFIER

July 3, 2008

Crescend Technologies
920 E. State Parkway
Schaumburg, IL 60173

Copyright Crescend Technologies Rev O

Tel: [phone]
Fax: [phone]
Email: [e-mail]
Web Site: www.CrescendTech.com

GENERAL DESCRIPTION

1.1. INTRODUCTION

This manual contains information and procedures for installation, operation, and general
maintenance of Crescend’s UHF Continuous Duty Power Amplifier.

1.2. PRODUCT DESCRIPTION

The Crescend Technologies UHF RF power amplifiers are design ed for trunking and conventional
repeater applications. Rack mountable and designed to accept a range of input powers for a given
rated output power, the amplifier covers a broad range of frequencies. Closed loop power control
is used to maintain a constant output power under varying voltage, signal input, frequency and
output load conditions. Several design features work to protect the amplifier under adverse
conditions.

The amplifier front panel includes status LED indicators for DC and Alarm conditions. RF Input,
RF Output, DC, summary alarm and power cutback connections are found on the back of the
amplifier. A fan is used to cool the amplifier.

Table 1-1. Amplifier Functional Specifications

Frequency Range: 403 – 470 MHz
Operating Voltage: +13.8 ±0.7 Vdc
Current Consumption: See Table 1-2
Duty Cycle: 100%
Power Input: See Table 1-2 (Range Set at Factory)
Power Output (Single Carrier Operation): See Table 1-2 (Set at Factory)
Power Output Change (Relatively set up value) + 1 dB (Maximum)
Input Return Loss: -10 dB (Maximum)
Spurious & Harmonics: - 65 dBc (Maximum)
Input/Output Impedance: 50 Ohms (Nominal)
Load VSWR Tolerance: VSWR Protected above 3.5:1 (Nominal)
Input/Output Connector: Type N Female
Vertical Mounting: 7.0 in
Horizontal Mounting: 19.0 in
Weight: 10 lbs (4.6 kg) (Nominal)
Cooling Method: Fan Forced Air Over Heat Sink
Operating Temp. Range: -30°C to +60 °C
Storage & Transport: -40 °C to +70 °C
Humidity: 80% at +40 °C (Non-Condensing)
Altitude: 10,000 Feet (Maximum)

INDICATORS

Front Panel Display:

Alarm and Control Pins:

DC ON (Green), LOW OUTPUT (Red), HIGH
VSWR (Red), OVER TEMP (Red)

SUMMARY ALARM

Summary of Low Output, High VSWR, Over Temp
Alarms

CONTROLS

CTRL(Partial Power Cutback)
SH/D (External Power Control)

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Table 1-2. Input/Output Power, Current, Spurious and Harmonics

Input Power Range (W)

0.1-0.2

0.2-0.5

0.5-1
1-2
2-5

5-10
10-20
20-50

Rated Output

Power (W)

80 (P8)

100 (P10)

Typ Current

(A)

18
21

Max Current

(A)

23
26

NOTES:

All specifications above apply at +13.8 ± 0.1 VDC operating voltage,

Manufacturer’s Rated Output Power of this Equipment is for Single Carrier
Operation.

ambient temperature of 25°C ± 5°C.

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2. INSTALLATION

2.1. INTRODUCTION

This section contains installation recommendations, unpacking, inspection, and in stallation
instructions for the amplifier. Carefully read all the material in this section prior to equipment
unpacking or installation. Also read and review the operating procedures in Section 3 prior to
installing the equipment. It is important that the licensee perform these tasks correctly and in good
faith. If applicable, carefully read Parts 73 and 74 of the Federal Communications Commission
(FCC) rules to determine how they apply to your installation.

2.2. ELECTRICAL SERVICE RECOMMENDATIONS

Crescend Technologies recommends that proper AC line conditioning and surge suppression be
provided on the primary AC input to the +13.8 VDC power source. All electrical service should be
installed in accordance with the National Electrical Code, any applicable state or local codes, and
good engineering practice. Special consideration should be given to lightning protection of all
systems in view of the vulnerability of most transmitter sites to lightning. Lightning arrestors are
recommended in the service entrance. Straight, short ground runs are recommended. The
electrical service must be well grounded. Each amplifier should have its own circuit breaker.

2.3. UNPACKING AND INSPECTION

This equipment has been operated, tested and calibrated at the factory. Only in the event of
severe mechanical shocks or other mistreatment should any substantial readjustment be required.
Carefully open the container(s) and remove the amplifier module(s). Retain all packing material
that can be reassembled in the event that the unit must be returned to the factory.

CAUTION:

Visually inspect the amplifier module for damage that may have occurred during shipment. Check
for evidence of water damage, bent or warped chassis, loose screws or nuts, or extraneous
packing material in the connector or fans. Inspect the rear panel connector for bent connector pins.
If the equipment is damaged, a claim should be filed with the carrier once the extent of any
damage is assessed. We cannot stress too strongly the importance of IMMEDIATE careful
inspection of the equipment and the subsequent IMMEDIATE filing of the necessary claims
against the carrier if necessary. If possible, inspect the equipment in the presence of the delivery
person. If the equipment is damaged, the carrier is your first area of recourse. If the equipment is
damaged and must be returned to the factory, write or phone for a return authorization. Cresce nd
may not accept returns without a return authorization. Claims for loss or damage may not be
withheld from any payment to Crescend, nor may any payment due be withheld pending the
outcome thereof. WE CANNOT GUARANTEE THE FREIGHT CARRIER’S PERFORMANCE.

2.4. INSTALLATION INSTRUCTIONS

This amplifier is designed for installation in a rack that permits access
connection of DC power, RF, and monitor/control cables. The amplifier must have a minimum of 3
inches of open space to the rear to allow adequate ventilation.

To install the amplifier proceed as follows:

1. Install amplifier in equipment rack and secure in place.

2. Connect a 50 ohm antenna cable and load to the RF OUT connector on rear of amplifier.

3. Connect the transceiver/exciter output to RF IN connector on rear of amplifier.

4. If monitoring of PA is desired, connect alarm cable to “ALARM” pin on rear of amplifier
module. See section 2.5 for more details.

5. If limited output power control of PA is desired, connect control cable or appropriate
resistor to “SH/D” pin on rear of amplifier module. See section 2.5 for more details.

Exercise care in handling equipment during inspection to
prevent damage caused by rough or careless handling.

to the rear of the rack for

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